Thermostat-regulator



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H. A. T OBBY. THERMOSTAT REGULATOR. l l No. 549,635. a PatentdctfZQ,1895.

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THERMOSTAT REGULATOR. NQ. 549,035. A Patented Oct. 29', 1895.

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PATENT HENRY ARCHIBALD TOBEY, OF TOLEDO, OHIO.

TH ERIVIOSTAT-REGULATOR.

SPECFICATION' forming part of Letters Patent No. 549,035, dated October29, 1895. Application filed September 4, 1894. `Serial N0.522,124. (Nomodel.)

To all whom t may concern: f

Be it known that I, HENRY ARCHIBALD TOBEY, a'citizen of the UnitedStates, residing at Toledo, in the" county of Lucas and State of Ohio,haveinvented certain new and useful Improvements inThermostat-Regulators; and l do hereby declare the following to beV afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention relates to an improvement in thermostatic devices.

The object of my device is to mix hot and cold Water or other liquids sothat the mixture may be discharged at a uniform temperature regardlessof the variations in temperature of either the hot or cold liquidentering the device.

Figure l is a top plan of the device. Fig. 2 is a side view of one ofthe bars supporting a lever. Fig. 3 is a front view with valves andlever removed. Fig. 4 is a vertical section on line a: a; of Fig. 1.Fig. 5 shows an external end view of one of the castings O forsupporting an expansive member.

Referring to the drawings, A and A are two tubes or pipes, made of brassor copper or a material having a large ratio of expansion by heat, andwhich are fastened rigidly at opposite ends into castings or boxes O andO. Box O has a chamber O2, with which the tubes A and A communicate. BoxO has a chamber O3, with which the-tubes A and A also communicate, andis provided with a discharge-pipe.

E and E are bars, made of cast-iron or some material having a low ratioof expansion by heat, and are united one wit-h the other by end straps aand a. They are supported in the respective boxes C C by being providedat their opposite ends with lugs f and f', which t loosely into socketsat m in the boxes. The bars E E constitute a stationary frame, on whichis mounted a lever B, pivoted at one end on a pin b between the bars EE. The lever B extends at its opposite end through a central opening ein box O and is bifurcated at that end to embrace a valverod J outsideof box O. Box C has fitted onto it at c and c valve-chambers, in whichare seated valves D and D'. The valve-chambers communicate withthechamber O2 of water-box O through ports d and d', respectively. Intothe center of box C extends a screw G, which is in con tact with theinner end of a rod H. The outer end of rod H is provided with aknife-edge 7i, which is adapted to engage with a shoulder on the head oflever B, The rod H is held from turning by means of a screw g, whichenters a slot made inthe side of the rod, while at the same time the rodis free to reciprocate.

The bifurcated end of lever B presses against a disk n, which is rigidlyfastened to rod J. The valve D is on rod J and the valve D on rod J.

K is a cylinder or barrel closed at both ends and inclosing spiralspring lc. Within the cylinder K is a disk rigidly fastened to the topof valve-stem J. The stem J is rigidly fastened to the upper end ofbarrel or cylinder K.

L is a weight supported on barrel K, which tends to hold valve D closedand valve D open.

M is an inlet for cold water, and N is an inlet for hot water.

Having thus described the various parts of my device, the operation isas follows: When cold water enters valve D and hot water enters valveD', they mix in chamber C2 of box O and pass through pipes A and A tothe discharge or outlet from the box C at F. Should the water passingthrough said pipes A and A cool, said pipes will contract or shorten,and the motion thus obtained will be imparted through rod H to theshoulder of lever B at h, the fulcrum of said lever being fixed instationary bars E and E. The outer or right-hand end of lever B will belifted upward, overcoming the pressure of Weight L andcarrying with itvalve-stems J and J', which movement opens Wider valve D', admittingmore hot water and tending to close valve D, lessening the amount ofcold water. When the temperature of the mixed hot and cold water againbecomes warmer, said pipes A and A will expand or lengthen and allow theouter o r right-hand end of lever B to descend, thus tending to closevalve D', lessening the amount of hot water admitted, and open widervalve D, increasing the amount of cold water admitted, therebymaintaining a uniform temperature of the water discharged from theapparatus. Spiral spring 7c in barrel K is for the purpose of guardingagainst breaking or straining the apparatus when the temperature getsbelow the point where valve D would be closed. Should the temperatureget below this point, the spring would be compressed as lever B islifted upward and prevent straining or breaking. It is obvious that thefarther screw G is screwed inward the more pipes A and A must expandbefore lever B will allow valve D to close; therefore the warmer thewater must be that is being discharged.

Although not shown, I anticipate that screw G could be connected with adial or hand for indicating the temperature of the water discharged by asimilar mechanism to that shown in connection with another device ofmine7 de scribed in my application, Serial No. 512,898.

I-Iaving thus described my invention, what I claim is- 1. A regulatingapparatus consisting of a receiving and a discharging chamber, incombination with two valve chambers and valves therein for supplyingsaid receiving chamber with liquids of different temperatures, expansiontubes connecting said receiving and discharging chambers and throughwhich tubes the liquid is conducted, a stationary frame between the saidchambers and the said tubes, a lever pivoted to said frame and connectedto the valve rod, said lever operated by the expansion and contractionof said tubes, and said valves operated by said lever, substantially asdescribed.

2. The combination with the receiving and discharging chambers and theconnecting eX- pansion tubes, of the connected stationary rods betweensaid tubes, said rods being of less expansive quality than the tubes,and on which rods the opposite chambers are free to move, a fulcruinedlever provided with a shoulder and connected to said stationary rods, arod connected to said discharging chamber and adapted to engagetheshoulder of said fulcrurned lever, a valve rod to which said fulcrumedlever is connected, and valves operated by said valve rod, substantiallyas described.

3. A regulating apparatus consisting of eX- pansible members forming aloop, a support for said loop, in combination with an adjustable rodconnected with said members, a stationary frame between the saidmembers, a lever fulcrumed to the said frame and in contact with saidrod, said lever operated through said rod by the expansion andcontraction ot said members, and a valve operated by said levercontrolling the medium which affects the eXpansible members,substantially as described.

In testimony whereof I afx my signature in presence of two witnesses.

HENRY ARCHIBALD TOBEY.

Witnesses:

I-I. C. IIAYs, F. D. ELMER.

